Theme for custom error pages igtnored

Hi Team,
Any fixes are going to be pushing for this issue, I'm getting same issue.

No, nobody from the team is working on this issue. A MR from one of the project's users will be considered.

We'll probably remove this functionality instead of fixing it if no one has a fix forthcoming.

Are there any modules that allow changing the theme on a given path that we could document as the recommended way to do this?